Sample adapter

• US 6,771,993 B2
• Filed: 08/15/2002
• Issued: 08/03/2004
• Est. Priority Date: 08/16/2001
• Status: Expired due to Fees

• Current Assignee: OptiScan Biomedical Corporation
• Original Assignee: OptiScan Biomedical Corporation
• Inventors: Hartstein, Philip C., Gable, Jennifer H., Braig, James R., Rule, Peter
• Primary Examiner(s): Jones, Mary Beth
• Assistant Examiner(s): KREMER, MATTHEW J
• Application Number:
  US10/219,996
• Publication Number:
  US 20030060694A1
• Time in Patent Office: 719 Days
• Field of Search: 600/309-310, 600/316, 600/322, 600/323, 600/331, 600/365
• US Class Current: 600/316
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/1455 using optical sensors, e.g. spectral photometrical oximeters
• CPC Class Codes: A61B 5/1491 Heated applicators
• CPC Class Codes: A61B 5/1495 Calibrating or testing of in-vivo probes

Abstract

An adapter presents a sample of bodily fluid, such as whole blood, including an analyte to an analyzer window of a non-invasive monitor. The adapter comprises a base material that comprises a first side and a second side. The adapter also comprises a sample accommodating volume extending between an opening in the second side of the base material and an opening in the first side of the base material.

Claims

1. A method for calibrating a noninvasive detection unit including a window, the method comprising:

determining whether there is a restricted period in effect;

selecting an on-site or an alternative site measurement location based on whether a restricted period is in effect;

withdrawing a sample of bodily fluid from a patient at the selected measurement location, the sample comprising at least one analyte;

positioning the sample over the window;

analyzing the analyte in the sample using the noninvasive detection unit and generating an invasive-measurement output representing a characteristic of the analyte;

placing the window of the noninvasive detection unit in contact with the skin of the patient;

analyzing the analyte in the tissue of the patient with the noninvasive detection unit;

generating a noninvasive-measurement output representing the characteristic of the analyte;

comparing the invasive-measurement output and the noninvasive-measurement output to estimate an error; and

correcting the noninvasive-measurement output based on said error.

2. The method of claim 1, wherein placing the window of the noninvasive detection unit in contact with the skin of the patient comprises placing the window in contact with the skin of the patient at the on-site measurement location or at the alternative site measurement location based on whether a restricted period is in effect.

3. The method of claim 1, wherein placing the window of the noninvasive detection unit in contact with the skin of the patient further comprises placing a thermal gradient inducing element of said noninvasive detection unit in contact with the skin of the patient.

4. The method of claim 1, further comprising correcting subsequent noninvasive outputs based on said error.

5. The method of claim 1, wherein generating an invasive-measurement output representing a characteristic of the analyte comprises generating an invasive-measurement output representing the concentration of glucose in blood.

6. The method of claim 1, wherein determining whether there is a restricted period in effect comprises measuring an amount of time since a subject has eaten.

7. The method of claim 6, wherein the amount of time measured is from about 0.5 hour to about 3 hours.

8. The method of claim 6, wherein the amount of time measured is from about 1 hours to about 2 hours.

9. The method of claim 6, wherein the amount of time measured is from about 1.5 hours to about 2 hours.

10. The method of claim 6, wherein the amount of time measured is about 2 hours.